『飛機』能否設計成『飛碟』的形狀??

『 飛機 』當然可以設計成『 飛碟 』的形狀，亦不是天方夜譚，已經面世數十年，因此沒有翼的飛機自然不影響飛行了。但由於效率的考慮，『 飛碟 』形狀只會使用在軍事上，因為軍事用途只從戰略價值出發。

Real Flying Saucers：
『 ‧‧‧in 1942 the Navy ordered the construction of an experimental aircraft designated the XF5U-1: A flying saucer ‧‧‧There is some evidence that during the Second World War the Germans had some interest in disc shaped aircraft, too, though it seems unlikely that any of their designs were ever flight tested. The next attempt to take advantage of the saucer shape was the VZ-9V Avrocar ‧‧‧』
http://www.unmuseum.org/realsauc.htm

PENTAGON'S FLYING SAUCER：
『 ‧‧‧Weighing at 250 pounds with a diameter of six feet, the MSSMP was meant to "provide a rapidly deployable, extended-range surveillance capability for a variety of operations and missions, including: fire control, force protection, tactical security, support to counterdrug and border patrol operations, signal/communications relays, detection and assessment of barriers (i.e., mine fields, tank traps), remote assessment of suspected contaminated areas (i.e., chemical, biological, and nuclear)‧‧‧』
http://www.defensetech.org/archives/001472.html
http://www.nosc.mil/robots/air/amgsss/mssmp.html

Military flying saucers：
『 ‧‧‧The development of disc shaped aircraft‧‧‧A number of disc-shaped aircraft have been proposed over the years, a few being built. The best documented of these was Arthur Sack's experimental Sack AS-6, a small light plane built just before the start of World War II.‧‧‧In the US, a number of experimental saucer shaped craft were apparently developed as black projects‧‧‧The saucer had the advantages of being a Vertical take-off and landing design (so avoiding the need for easily damaged runways), while the shape was well suited to diffusing radar and so making the craft stealthy. These early designs were apparently powered by turbojets, which powered a horizontal rotor to provide lift using the Coanda effect.‧‧‧in Canada, the Avro Canada company was also attempting to develop saucer shaped craft‧‧‧』
http://en.wikipedia.org/wiki/Military_flying_saucers

well done

其實飛機並不一定要有翼的，有翼與否，主要視乎設計及用途。

現在常見的有翼飛機，上升的動力基本是由機翼提供(當中涉及流體力學的知識，有興趣可參考有關的教材： http://www.ied.edu.hk/apfslt/v5_issue1/ngph/ngph2c.htm#twoc)，另外由於平衡比較容易，也可以作滑翔飛行，穩定性及能源使用效率的考慮下，應用很廣。

但這種設計也有其限制，就是必須一足夠長的跑道，讓飛機加至足夠的速度，才能產生起飛需要的浮力，下降也須要跑道去減速，靈活度明顯不足。所以又發展出直昇機 - 一種可以垂直上升、幾乎能在任何平坦表面上升及下降、可以更靈活改變飛行方向、甚至在空中停留的飛行工具。直昇機不須長長的機翼，因其動力是由機頂高速轉動的螺旋槳所提供。但相對地，它的飛行穩定性則較低。

碟形及至球形的飛行器亦有人曾經嘗試制作，但均未能解決技術上的問題而沒有能廣泛應用。

沒有翼的飛機會影響飛行...
因為翼是用o黎平衡的.除了平衡.
翼上還有其他野，如幫助升降的 Devices and function.
飛機的形狀的可以比風好易"si"過.

而引擎的位置也要考慮 同 計過數的，放在翼上 or 機尾..
也要考慮 個 weight , force 等問題.

除了以上兩個小問題，我想重有其他問題的..

如果成『飛碟』的形狀而解決到上面的問題就不會影響飛行了..
但如何有個好有錢的人[用過千億]想咁做一定可以設計成『飛碟』的形狀的.因為生產成本問題..